Our group builds on the tools of superconducting circuits to develop applications in two broad areas,

1) A microwave quantum memory (QM) based on electron spins, and

2) A quantum-limited electron spin resonance (ESR) spectrometer.

The experiments are carried out in the quantum regime, at the base temperature of a dilution refrigerator ~20mK and incorporate superconducting resonators with tunable frequency and bandwidth for in-situ tunability of coupling strengths. Low temperature and Josephson parametric amplifiers in particular allow vacuum-noise limited detection of coherent signals, paving the way for high sensitivity and spatially-resolved ESR on van der Waals materials and systems with dilute paramagnetic centers.